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300mK-UHV-scanning-tunneling-microscope- facility with 14T magnet
The unique power of spin-resolved scanning tunneling spectroscopy (SP-STS) is its ability to give direct access to the spin-resolved local density of states (LDOS) of the electron system of conducting solid surfaces with a high spatial and energy resolution. The high spatial resolution is basically guaranteed by the working principle of an STM for all temperatures. A high energy resolution requires low temperature systems.
Figure below gives an overview of the facility. The main part of the system is a 3He evaporation refrigerator in a bottom loading cryostat which was built by Oxford Instruments Superconductivity. It contains a superconducting single coil magnet and the home-built low temperature STM.
The home-built STM head has been designed to be as small and compact as possible in order to make it less susceptible against vibrations.
More detailed informaton are given in:
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